Window screen



WINDOW SCREEN -Fi1ed`Feb. 9, 1942 Nov. 24, 1942.

y ATTRNEY.

Patented Nov. 24, 1942 WINDOW SCREEN Leland T. Milnor, Indian Hill,Ohio, assignor to The Cincinnati Fly Screen Company, Clncin-A nati,Ohio, a corporation of Ohio Application February 9, 1942, Serial No.430,061 A 4 Claims. (Cl. 16o-328) 'Ihis invention relates toimprovements in window screens of the type commercially referred to asframeless, having the screen fabric clipped within or bound at relativeopposite ends respectively by a binding rail for direct attachment tothe window frame, and upon tautly spanning the screen fabric, itslongitudinal margins are brought into intimate contact with relativerails or strips designatedl as blind stops protruding metal rails ofduplicate structure for binding the relative or opposite top and bottomends of thel screen fabric for. direct application to a window frame oropening framing, the rails cut from stock length or trimmed at one endto a length 55 size for a given or specific length of opening, and foredge or end binding various different styles or types of screen fabric,and to which conventional types of fasteners can be readily applied forquick attachment and detachment of the screen to the opening frame, andfor drawing the screen fabric tautlyin place.

Another object is to provide an improved screen of the frameless type ofsimple construction and from and a part of the window vframe. o lowmanufacturing cost, and adapting the parts The screen with its bindstrips or rails as a to be easily and readily fitted and assembled tounit is readily attached and detached from the meet specificmeasurements atthe place of inwindow frame, and can be compactly foldedor stallation as well as its applicationA to the openrolled4 up forshipping and storage. The screen ing framingfabric generally is of alength and width of a sizel l5 Various other features and advantages ofthe to shield the full area of window opening, and invention will bemore fully set forth in a dethe binding rail at one end of the fabric isscription of the accompanying drawing, in which: equipped for detachablemounting to the top of Figure 1 is an elevation of a window frame tthewindow frame, and the second rail at the ted with a frameless windowscreen constructed opposite or lower end for detachably connecting 0 inaccordance withand illustrating an embodiwith the window sill and fordrawing the fabric ment of the invention, the view being from the taut.inner or operating side.

The present improvement is directed to sim- Figure 2 iS an` enlargedsection on line 2-2, plify and increase the durability of the bindingFigure 1. rails and their mode of attachment to the win- 35 Figure 3 iSa Section 0n line 3-3, Figure 2- doW frame to effect a reduction in costover the Figure 4 is a perspective view of a section of prevailing typesof binding rails employed for the beading or clamping strip for securingthe frameless screens, and to utilize a conventional screen fabrictoabinding rail. sheet metal strip material commonly referred to Figure 5is an enlarged plan View ef a portion as molding employed in themanufacture of metal 'i0 of the screen, illustrating the improvedbeading frames for screens. The same strip materialis or clamping stripfor securing a shade screen fabemployed for the binding rails at theopposite or ric t0 the binding rails. I top and bottom ends of thescreen fabric, and Figure 6 is a view similar to Figure 5, with theprovides for clinching the marginal end of the beading or clamping stripin a reverse position fabric within a channel Yin the rail by a channel35 for securing the Conventional Square mesh wire form of beading orclamping strip compressed screen fabric to a pair of binding rails. intothe channel of the binding rail. In a frameless screen, a specificlength and The beading or clamping strip is of improved width of metalscreen fabric appropriate for the form to adapt its use for clampingseveral differsize of window opening is provided at its top and' enttypes of screen fabric, as for example, the 40 bottom ends withtransverse rigid rails to which conventional round wire square meshscreen fabthe edge of the fabric is bound. The upper rail ric, and asecond type designated as a shade is detachably fastened to the uppercross rail of screen fabric consisting of closely spaced, subthe Windowframe, preferably by means of devices stantially parallel, thin gauge,flat metal strips as operable from the inside, and the lower rail,herehorizontals tied together in their spaced relation l5 toforegenerally consisting of a duplex or lat;- by strands of twisted wire asverticals,` disposed erally extensible form of rail, is detachably fasamajor spacing apart.y tened to the window sill. The longitudinal free Itis, therefore, an object of the invention to edges or margins of thefabric overlappingly conprovide a frameless type yof screen for windowtact with the usual strip or blind stop projecting and other openingswith rigid transverse sheet 50 fromjthe window frame.

Under the prevailing practice, the lower rail is composed of a pluralityof strips relatively slidably joined for vertical or lateralextensibility of the rail, one strip connecting with the screen fabric,and the second locked to the sill. Means operable from the inside aremounted on the bottom rail for forcibly moving the strips of the railrelatively to draw the screen fabric under tension and bring itslongitudinal free margins in intimate contact with the Window frame.

Considerable mechanical work is required for a proper fittinginstallation of the frameless screen to a window frame, and embodying acostly rail, construction, and therefore, did not lend itselfcompetitively with the frame type of screen, a1- though the framelesstype offers considerable' advantage over the frame type in that it canbe compactly rolled up and taken down for storage. The presentimprovement offers a reduction in manufacturing cost, greaterconvenience in making a window opening fitting as well as increasing itsutility in its adaptability for use in connection with various stylesand types of screen fabric.

Referring to the drawing, I indicates a conventional window framecomposed of a pair of jambs 2, 2, top rail 3 connecting the upper endsof the jambs, and a sill 4 connecting the bottom ends of the jambs, eachjamb and the cross rail having the usual blind stop or strip 5projecting inwardly of the frame. The frameless screen comprises a toprail 6, a bottom rail 1, and a screen fabric 8 having its opposite endsrespectively fixed to said top and bottom rails. The top and bottomrails 6 and 'l in the present instance are of dupli for example, of across-sectional formation, as

shown and described inL Letters Patent of the United States No.1,743,935 to A. C. Schneider et al., January 14, 1930.

As illustrated, the strip is formed of a single sheet of metal shaped tocomprise a rectangular hollow or tubular body portion 9 with theopposite longitudinal edge of the sheet metal brought together in alaminated extension at one end of the body portion and in plane with oneside thereof to provide a base wall I of a channel Il longitudinally atone end of the strip and formed by bending the free ends of the metal ata right angle to the base wall 9 to provide a laminated side wall l2 forthe channel. The free end of the outer ner layer, and its edgemarginally crimped inwardly upon itself for reinforcement and roundingthe free edge of the channel wall.

The Heading strip I3, for frictionally clamping the screen fabric intothe channel, constitutes a -strip of sheet metal bent into channel or U-form in cross-section with its free ends longitudinally of the stripmarginally bent upon itself inwardly to reinforce and round the edge.One limb or flange of the beading strip is laterally notched orserrated. The notches |3a are disposed at definite uniform spacing apartand terminate slightly inward into the base wall or web and in a curvedor rounded form. The notches provide a clearance for the verticaltwisted wire strands Il of a shade style metal screen fabric. Thetwisted wire strands loop about thin gauge flat wire horizontals Iminutely spaced apart and have their flat sides parallel and set at aslight angle to the plane of the shade. This type 7 of screen fabric fora frameless screen is advantageous over the square mesh woven type ofscreen fabric in that the horizontals can be cut between a pair ofverticals to reduce the width of 5 sitated with the woven square meshtype of screen fabric, which requires a selvage edge to prevent unravel.

Owing to the large degree of spacing of the verticals, a comparativelylimited number of verlo ticals are employed, and it is desirable toavoid impingement thereof which causes their breakage in binding thescreen fabric within the rail. Impingement of the verticals is preventedin having the same extend in the notches of the beading 5 strip. As theresult desired is accomplished by notching only one flange of thebeading strip, the second or opposite flange is left intact so that thestrip can be reversed when utilized for binding the conventional squaremesh wire screen o fabric to a rail, as shown in Figure 6.

The top rail 6 at the inner side of the screen is provided with aplurality of fasteners or latches IS, each preferably in the form of asheet metal stamping, consisting of a disc I1 rotativeLv aperture in therail and held in place by a thumb nut I 9 screw-threaded upon the bolt.The disc has a curved flange segment extending laterally from one sidethereof, and the flange is slotted for effecting a locking engagementwith a screw 2| fixed into the window frame. A handle 22 integral withthe disc extends radially therefrom. A'slight arc of rotation of thedisc moves the locking flange either into or out of engagement with thes crew for attaching or detaching the rail to the window frame. Theconfiguration of the notch in the locking flange and the curvature ofthe flange serves to draw the rail inwardly against the window frame,and also o slightly outwardly. The rail is preferably provided with aseries of lined apertures for adjustably positioning the latch fasteneron the rail.

The lower rail 1 is equipped with a plurality of latches 23, the numberbeing optional and depending upon the rail length; usually a pair willsuffice. The latch is of conventional construction, comprising a baseplate 24 fixed to the rail by a pair of screws and rotatively sustaininga disc 25 integrally having a handle extension and layer of the wall I2is extended beyond the in- 50 a cam or key element. 28 at its rear sidethereof traversing an aperture 21 in av hasn plate 2l. Upon rotation ofthe key relative movement is imposed to the hasp plate. The hasp plateat its lower end has a laterally extended latch bar 2l 55 adapted forinterlocking connection with a latch plate 30 fixed to the window sill.

Upon interengaging the latch bar 2l with the latch plate, and rotatingthe key or cam by its actuating handle in an appropriated direction ora0 arc of revolution, the rail 1 is depressed, locking the rail tothe'sill and drawing the screen fabric undertension to an ample degreeof tautness and bringing its longitudinal Afree margins into intimatecontact with the blind stops of the window frame.

Moving the latch handle in a reverse direction will move the latch platedownwardly or outwardly, releasing the tension on the screen fabric andpermitting the lock bar to be unhooked or disengaged from the latchplate and release of the lower rail, so that the screen fabric with itslower rail can be swung outwardly without release of the top rail foraccess to the window the fabric to meet a definite width of window upanes for cleansing.

bolted to the rail 6 by a bolt I 8 traversing an ing the opening, railsfor respectively rigidly v binding relative opposite ends of the screenfabric, the rails formed of sheet metal and of duplicate cross section,each having a channel longitudinally in one side thereof for thereception of an end margin of the screen fabricand fastener ldevicesrespectively fixed to said binding rails for removably attaching therails to the opening framing respectively at the top and bottom thereofand *for drawing the screen fabric under tension; a beading strip ofU-form in cross section intertting said channel for binding the marginof the screen fabric within the channel, one longitudinal ange of saidstrip laterally serrated providing a plurality of adjacent tonguesections, each adapted to be engaged between a pair of vertical strandsof said screen fabric, the serrations providing a strand clearance.

2. A railforbinding an end of a screen fabric for a frameless type of-screen, the rail having a longitudinal channel in one side thereof forthe reception of an edge of the screen fabric, and a strip U-form incross section for interengagement in said channel, one limb thereofhaving a series of lateral notches subdividing the limb into a pluralityof tongues, each for engagement through the mesh of the screen fabricbetween adJacent pairs of longitudinal strands of the fabric, eachnot'ch providing a clearance for a'vertical strand of the screen fabricin binding the fabric to the rail.

3.'A rail fOr binding an end of a screen fabric, the rail having alongitudinal channel in one side thereof for the reception of an edgemargin of the screen fabric, and a channel strip intermeshing in saidchannel for binding the fabric in the channel having one limb thereof.laterally serrated, each 'serration providing a clearance for avertical strand of the screen fabric in binding the fabric to the rail.

4'. A binding strip for intermesh within a channel in a rail forsecuring an edge of a screen fabric to the rail, the strip being ofchannel form in cross section having one limb thereof laterallyserrated, each serration providing a clearance for a vertical strand ofthe screen fabric in binding the fabric to the rail.

' LELAND T. MILNOR.

